. Bulletins of American paleontology. Cretaceous Radiolaria: Pessagno 289 Series Stage TEXT- FIGURE 2: Evolurion of Pseudoaulophacidoe at Family and Generic Levels Swellings in life lines indicate times of greater abundance and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]

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